sensor technology to assess the traffic situa-
tion.
Situation-dependent braking assistance is capa-
ble of reacting to moving objects that have
alreadybeen detected as such at least once
over the period of observation, up to vehicle
speeds of around 155 mph (250 km/h).
Situation-dependent braking assistance can
also detect stationary objects, up to vehicle
speeds of around 44 mph (70 km/h).
XKeep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally againi f:
Ryou release the brake pedal.
Rthere is no longer any danger ofacollision.
Rno obstacle is detected in front of your vehi-
cle.
Situation-dependent braking assistance is then
deactivated.
Important safety notes
iObserve the "Important safety notes" sec-
tion for driving safety systems (Ypage 61).
GWARNING
Adaptive Brake Assist does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
As aresult, Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake.
GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist might:
Rintervene unnecessarily
Rnot intervene
There is arisk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake. Terminate the
intervention in anon-critical driving situation.
Due to the nature of the system, complex but
non-critical driving conditions may also cause
Active Brake Assist to intervene.
Even if Active Brake Assist is not available due to
am alfunction in the radar sensor system, the
brake system is still available with full brake
boosting effect and BAS.
ESP®(Electronic Stability Program)
General notes
iObserve the "Important safety notes" sec-
tion (Ypage 61).
ESP
®monitors driving stability and traction,i .e.
power transmission between the tires and the
road surface.
If ESP
®detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilize the vehicle. The
engine output is also modified to keep the vehi-
cle on the desired course within physical limits.
ESP
®assists the driver when pulling awayo n
wet or slippery roads. ESP®can also stabilize
the vehicle during braking.
ETS/4ETS (Electronic Traction System)
iObserve the "Important safety notes" sec-
tion (Ypage 61).
ETS traction control is part of ESP
®.Onv ehicles
with 4MATIC, 4ETS is part of ESP®.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
awaya nd accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP
®.
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 61).
64Driving safety systems
Safety
XTo deactivate ESP®:press button :until
the å ESP®OFF warning lamp lights up in
the instrument cluster.
The ÷ OFF
message appears in the multi-
functio ndisplay.
XTo activate ESP®:briefl ypress button :.
The å ESP®OFF warning lamp in the
instrument cluster goe sout.T he ÷ ESP®
ONmessage appears in the multifunctio ndis-
play.
Characteristic sofactivatedS PORT han-
dling mode
If SPOR Thandling modeisa ctivatedand one or
more wheels start to spin, the ÷ESP®warn-
ing lamp in the instrument cluster flashes. ESP®
onlys tabilizes the vehicl etoalimite dd egree.
Whe nSPOR Thandling modeisa ctivated:
RESP®onlyimprovesd riving stability to alim i-
ted degree.
RTractio ncontroliss tilla ctivated.
RThe engine's torque is onlyr estrictedtoa
limite ddegreea nd the drive wheels may start
to spin.
The spinning of the wheels results in acutting
action for better tractio nonloose surfaces.
RESP®stil lprovides support when yo ubrake
firmly.
Characteristic swhenE SP®is deactivated
If ESP®is deactivate dand one or more wheels
start to spin, the ÷ESP®warning lamp in the
instrument cluster does not flash. In such situa-
tions, ESP
®will not stabilize the vehicle.
If yo udeactivate ESP®:
RESP®no longer improvesd riving stability.
REngine torque is no longer limite dand the
drive wheels are able to spin.
The spinning of the wheels results in acutting
action for better tractio nonloose surfaces.
RTractio ncontroliss tilla ctivated.
RActive Brake Assist is no longer available ;nor
is it activate difyoubrake firmly with assis-
tance from ESP
®.
RESP®stil lprovides support when yo ubrake
firmly.
ESP®trailer stabilization
General information
If your vehicle/trailer combinatio nbegin sto
swerve ,ESP®assists yo uinthissituation. ESP®
slowst he vehicl edownbyb raking and limiting
the engine outputu ntilthe vehicle/trailer com-
bination hass tabilized.
Important safety notes
GWARNING
If roada nd weather conditions are poor,
traile rstabilization will not be able to prevent
the vehicle/trailer combinatio nfrom swerv-
ing .Trailers with ahighc ente rofg ravity can
tip overb efore ESP
®can detect this. There is
ar iskofana ccident.
Alway sadapt your driving style to the prevail-
ing roada nd weather conditions.
If your vehicl ewitht raile r(vehicle/trailer com-
bination) begins to lurch, yo ucan onlys tabilize
the vehicle/trailer combinatio nbydepressing
the brake firmly.
ESP
®traile rstabilization is active above speeds
of about65k m/h.
ESP
®traile rstabilization does not work if ESP®
is deactivate dordisable dbecause of amalfunc-
tion.
EBD (electronicb rake forcedistribu-
tion)
General information
EBD monitors and controls the brake pressure
on the rearw heelstoi mprove driving stability
whil ebraking.
Important safety notes
iObserve the "Important safety notes "sec-
tio n(Ypage 61).
GWARNING
If EBD is malfunctioning ,the rearw heelscan
lock, e.g .under ful lbraking .Thisi ncreases the
ris kofs kidding and an accident.
Driving safety systems67
Safety
Z
You should therefore adapt your drivingstyle
to the differenth andlingcharacteristics. Have
the brakes ystemchecked at aqualified spe-
cialist workshop.
Please observet he information on warnin gand
indicator lamps (
Ypage 220)
(
Ypage 220) as well as on display messages
(Ypage 194).
ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safetya nd
offers increased braking comfort.Ina ddition to
the braking function ,ADA PTIVE BRAKE also has
the HOLDf unction (
Ypage 157) and hill start
assist (Ypage 125).
STEER CONTROL
Genera linformation
STEER CONTROL helps you by transmitting a
noticeable steeringf orcetothe steeringw heel
in the direction required for vehicle stabilization.
This steeringa ssistanceisprovided in particular
if:
Rboth right wheels or both left wheels are on a
wet or slippery road surfacew hen you brake
Rthe vehicle begins to skid
Important safetynotes
iObserve the "Importan tsafetyn otes" sec-
tion (Ypage 61).
No steeringa ssistanceisprovided from STEER
CONTROL, if:
RESP®is malfunctioning
Rthe steeringism alfunctioning
If ESP®is malfunctioning, you will be assisted
further by the electrical power steering.
Protection against theft
Immobilizer
The immobilizer prevent syour vehicle from
being started without the correctS martKey.
XTo activatewith theSmartKey: remove the
SmartKey from the ignition lock.
XTo activatew ith KEYLESS-GO start-func-
tion or KEYLESS-GO: switchthe ignition off
and open the driver's door.
XTo deactivate: switchont he ignition.
When leaving the vehicle, always tak ethe
SmartKey with you and lock the vehicle. Anyone
can star tthe engin eifavalid SmartKey has been
left inside the vehicle.
iThe immobilizer is always deactivate dwhen
you star tthe engine.
In the eventt hat the engin ecannot be started
(yet the vehicle's battery is charged), the sys-
tem is not operational. Contact an authorized
Mercedes-Ben zCenter or call
1-800-FOR-MERCedes (in the USA )or
1-800-387-0100( in Canada).
ATA (anti-theft alarms ystem)
XTo arm:lock the vehicle with the SmartKe yor
KEYLESS-GO.
Indicator lamp :flashes. The alarm system
is armed after approximately 15 seconds.
XTo disarm: unlock the vehicle with the Smart-
Key or KEYLESS-GO.
or
XInsert the SmartKe yintot he ignition lock.
Av isual and audible alarm is triggered if the
alarm system is armed and you open:
Rad oor
Rthe vehicle with the mechanical key
Rthe trun klid
Rthe hood
68Protection against theft
Safety
XTo turn the alarm off with the SmartKey:
press the%or& button on the Smart-
Key.
The alarm is stopped.
or
XVehicles with KEYLESS-GO start-function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock (
Ypage 122).
XInsert the SmartKey into the ignition lock.
The alarm is stopped.
XTo stopt he alarm using KEYLESS-GO:
grasp the outsid edoorh andle. The SmartKey
must be outsid ethe vehicle.
The alarm is stopped.
or
XPress the Start/Stop button on the dash-
board .The SmartKey must be insid ethe vehi-
cle.
The alarm is stopped.
The alarm is not switched off, eve nifyouclose
the open door thatt riggered it, for example.
iIf the alarm continue sfor more than
30 seconds ,the mbrace emergency cal lsys-
tem automaticall ynotifie sthe Customer
Assistance Center. Thi sisdonee ither by text
message or data connection.
The emergency cal lsystem send sthe mes-
sage or data provided that:
Ryo uh aves ubscribed to the mbrace service.
Rthe mbrace service hasb eena ctivated
properly.
Rthe necessary mobil ephone network is
available.
Protectiona gainsttheft69
Safety
Z
SmartKey
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is arisk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GWARNING
If you attach heavy or large object stothe
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a risk of an accident.
Do not attach any heavy or large object stothe
SmartKey. Remove any bulky key rings before
insertingt he SmartKey into the ignition lock.
!Keep the SmartKey away from stron gmag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey:
Rwith electronic devices, e.g. amobile phone
or another SmartKey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. ametal case
Vehicles with KEYLESS-GO startf unction:do
not keep the SmartKey in the trunk.O therwise,the SmartKey may not be detected, e.g. when
startin
gthe engine using the Start/Stop button.
SmartKey functions
:& To lock the vehicle
;FTo open the trunk lid
=%To unlock the vehicle
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
Rthe vehicle is locked again.
Ranti-theft protection is reactivated.
XTo lock: press the &button.
The SmartKey centrally locks/unlocks:
Rthe doors
Rthe trunk lid
Rthe fuel filler flap
The turn signals flash once when unlocking and
three times when locking.
When the locator lighting is activated via the
multimedia system, it lights up when it is dark
after the vehicle is unlocked with the remote
control (see the separate operating instruc-
tions).
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated using
the on-board computer (
Ypage 187).
XTo open the trunk lid automatically: press
and hold the Fbutton until the trunk lid
opens (
Ypage 79).
70SmartKey
Opening and closing
KEYLESS-GO
Gene raln otes
Bear in min dthatthe engin ecan be started by
any of th evehicl eoccupant sifthere is aSmart-
Key in th evehicle.
Lockin gand unlocking
You can start ,loc koru nlockthe vehicl eusing
KEYLESS-GO .Todothis, you only need carry th e
SmartKey wit hyou. You can combine th efunc-
tion sofK EYLESS-GO wit hthose of aconven-
tional SmartKey. Unloc kthe vehicl ebyu sing
KEYLESS-GO ,for instance ,and loc kitusingthe
& buttonont heSmartKey.
The driver's door and th edoor at whic hthe han -
dle is used ,mustb othbec losed. The SmartKey
mus tbeo utside th evehicle. Whe nlocking or
unlocking wit hKEYLESS-GO ,the distanc e
between th eSmartKey and th ecorre sponding
door handle mus tnotbe greate rtha nt hree fee t
(on em eter).
Ac heck whichperiodically establishes aradi o
connection between th evehicl eand th eSmart-
Key determine swhether avalid SmartKey is in
th ev ehicle. This occurs, for example:
Rwhen starting th eengine
Rwhile drivin g
Rwhen usingHANDS-F REEA CCESS
Rwhen th eexternal door handles are touched
Rduring convenience closin g
XTo unlock thevehicle: touch th einner sur -
fac eoft hedoor handle.
XTo lock th evehicle: touch sensor surfac e:
or ;. Mak
esuret haty ou do no ttou ch th einner
surfac eofthedoor handle.
XConvenienc eclosin gfeature: touch
recessed sensor surfac e; for an extended
period.
Further information on th econveni ence clos-
ing feature (
Ypage 83).
XTo unlock th etrunk lid :pull trunk lid han -
dle :.
Deactivating and activating
If you do no tinten dtou se thevehicl efor alon -
ger period of time, you can deactivat eKEYLESS -
GO. The SmartKey will then use ver ylittl ep ower,
thereby conserving battery power. Fo rthe pur-
poses of activation/deactivation ,the vehicl e
mus tnotbe nearby.
XTo deactivate: press the& buttonont he
SmartKey twice in rapi dsuccession .
The battery chec klamp of th eSmartKey
flashes twice briefl yand lights up once ,the n
KEYLESS-GO is deactivated (
Ypage 73).
XTo activate:press any butto nontheSmart -
Key.
or
XInser tthe SmartKey int othe ignition lock.
KEYLESS-GO and all of it sassociated features
are available again .
KEYLESS-GOstartfun ction
Gene raln otes
Bear in min dthatthe engin ecan be started by
any of th evehicl eoccupant sifthere is aSmart-
Key in th evehicle.
SmartKey71
Opening and closing
Z
Changing thesettings of th elocking
system
You can chang ethe settings of th elockin gsys-
tem. This mean sthato nlyt he driver'sd oor and
th ef uel fille rflap are unlocked when th evehicle
is unlocked. This is useful if you frequently travel
on your own.
XTo change th esetting: pressand hold the
% and& buttons simultaneouslyf or
approximately six seconds until th ebattery
indicator lamp flashes twice (
Ypage 73).
If th esettin goft helockin gsystem is changed
within th esignal range of th evehicle ,pressing
the & or% button:
Rlocks or
Runlock sthe vehicle
The SmartKey no wfunctionsasf ollows:
XTo unlock:pressthe % buttononce.
XTo unlock centrally: pressthe % button
twice.
XTo lock centrally: pressthe & button.
The KEYLESS-GO function is changed as fol-
lows:
XTo unlock th edriver's door: touch theinner
surface of th edoor handle on th edriver's
door.
XTo unlock centrally: touch theinner surface
of th edoor handle on th efront-pa ssenger
door or th erear door.
XTo lock centrally: touch theouter sensor
surface on oneoft hedoor handles.
XTo restor ethe factor ysettings: pressand
hold the %and& buttons simultane-
ously for approximately six seconds until the
battery check lamp flashes twi ce
(
Ypage 73).
Mechanica lkey
General notes
If th evehicle can no longer be locke dor
unlocked witht heSmartKey or KEYLESS-GO,
use th emechanical key.
If you use th emechanical ke ytou nlock and
open th edriver'sd oor or th etrunk lid, th eanti-
theft alarm system will be triggered (
Ypage 68). Therea
re several ways to tur noff th ealarm:
XTo deactivat ethe alarm with th ekey: press
the % or& buttonont hekey.
or
XInsertt heSmartKey int othe ignition lock.
or
XTo deactivat ethe alarm with KEYLESS-GO:
pres sthe Start/Sto pbutto nint heignition
lock. The SmartKey must be in th evehicle.
or
XLockoru nlock thevehicle usingK EYLESS-
GO. The SmartKey must be outside th evehi-
cle.
If you unlock th evehicle usingt hemechanical
key, th efuel fille rflap will no tbeunlocked auto-
matically.
XTo unlock th efuelfille rflap: insert the
SmartKey int othe ignition lock.
Removing th emechanica lkey
XPush release catch :in th edirection of the
arrow and at th esame tim eremove mechan-
ical key ;from th eSmartKey.
For further informatio nabout:
RUnlockin gthe driver'sd oor (Ypage 77)
RUnlockingthe trunk (Ypage 81)
RLockin gthe vehicle (Ypage 77)
Insertin gthe mechanica lkey
XPush mechanical key ;completely int othe
SmartKey until it engages and release
catch :is back in its basic position.
72SmartKey
Opening and closing
SmartKey battery
Important safety notes
GWARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is arisk of fatal
injury.
Keep batteries out of the reach of children. If
ab attery is swallowed, seek medical attention
immediately.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm.
Mercedes-Benz recommends that you have the
battery replaced at aqualified specialist work-
shop.
Checking the battery
XPress the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
XChange the battery (Ypage 73).
iIf the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the &or% button:
Rlocks or
Runlocks the vehicle
iYou can get abattery at any qualified spe-
cialist workshop.
Replacing the battery
You require aCR20253Vc ell battery.
XTake the mechanical key out of the SmartKey
(Ypage 72).
XPress mechanical key ;into the opening in
the SmartKey in the direction of the arrow
until battery tray cover :opens. When doing
so, do not hold cover :shut.
XRemove battery tray cover :.
XRepeatedly tap the SmartKey against your
palm until battery=falls out.
XInsert the new battery with the positive ter-
minal facing upwards. Use alint-free cloth to
do so.
XMake sure that the surface of the battery is
free of lint, grease and other contaminants.
XInsert the front tabs of battery tray cover :
and then press to close it.
XInsert mechanical key into the SmartKey
(Ypage 72).
XCheck the function of all SmartKey buttons on
the vehicle.
SmartKey73
Opening and closing
Z